Predatory prawns eliminate a major parasite more effectively than drugs alone

In the late 1970s, a new drug held the promise of wiping out a disease that currently affects more than 250 million people. Nearly 40 years later, the drug, praziquantel, has yet to make a dent in the global burden of schistosomiasis, an infestation of parasitic flatworms that can cause liver failure, bladder cancer and lasting cognitive impairment. A new Stanford-led analysis of national health interventions over the past century shows that controlling the snail populations through ecological i...